public async Task <IActionResult> Encodage(ScoreViewModel myModel)
        {
            if (ModelState.IsValid)
            {
                var o = myModel.StudentSubmit;
                foreach (var item in o)
                {
                    var data = new Score()
                    {
                        ClassId      = myModel.ClassId.Value,
                        CourseID     = myModel.CourseId,
                        StudentID    = item.StudentId,
                        PeriodID     = myModel.PeriodId,
                        Point        = item.Score,
                        CreatedDate  = DateTime.UtcNow.Date,
                        ModifiedDate = DateTime.UtcNow.Date
                    };
                    sr.Add(data);
                }
                await sr.SaveChangesAsync();

                return(RedirectToAction("Create"));
            }
            InitializeDropdownlist();
            return(View(myModel));
        }